Absolutely without a shadow of a doubt any of the models in the Ricoh GR1 range. Unbelievably sharp lens (fixed, 28mm), and the compact camera of choice for many professionals such as Joe Cornish and Charlie Waite. I even know photographers who've shot 35mm slide with it and had them used as magazine covers.
I've had one for a few years, it's still performing perfectly, and believe me I've given it quite a battering.
You'd better be quick, however, as Ricoh recently announced it won't be manufacturing them any more. Some dealers might still have stock, or you could pick one up second hand - although they don't appear too often because they're so darn good.